Stop-device for sewing machines



Dec. 1, 1931. R, SMITH 1,834,430

STOP DEVICE FOR SEWING MACHINES Filed Sept 12 1928 Patented Dec. '1, 1931 v entree srArEs RICARDO M. SlVIITI -I, OF

ennie PASSAIC, NEW JERSEY, ASSIGNOR TO I. o. HERMAN & COMPANY, .15,

Inc, A CORPORATION ornnw JERSEY STOP-DEVICE FOR SEWING MACHINES Application filed September 12, 1928; Serial NO. 305,847.

chine can be stopped. Such machines are ar-.

ranged in rows with a single attendant for many machines and the machines are replenished as to goods and thread by the attendant. The machines at present stop automatically when the supply of goods or thread is exhausted and such stop devices are not new and one is used in connection with the present invention. The stop-devices are electrical conneotions'for disconnecting the power supplied to the machine so that the machine stops when the clutch or disconnecting device is energized.

The present invention is arranged so that the goods passes through it on the way to the needle and a thickened part on the goods, such as a seam or other obstruction too large to pass through the hemmer or under thepresser foot or through a similar device engages this the fixed terminal of this circuit and the clutch on the machine is energized to stop the machine. Anyone skilled in the art will readily understand the operation and installation of this fixture.

The invention is exemplified in the accompanying. drawings in which Figure 1 is a side View of a stop device made according to my invention. Figure 2 is a side view of the device and Figure 3 is a section on line 33 in Figure 2. r i y The path of the goods is shown in dotted lines at 10, as passing over the bar 11 and the goods descends at 12 to the sewing machine.

7 The device comprises a bracket 13 clamped by the screw 14 around the bar 11'. The strip 15 is fixed in position although-it has a slight spring to it and forms a terminal as it is connected by a screw l6 to thewire 17 of the'elecdevice, the seam or enlargement moves the movable termlnal of the stop circuit against tric circuits. The movable strip 18 is shown hinged at 19 to the strip 20 which is secured to the bottom step or extension 21 ofthe bracket 13. The screw 22'serves as a bindlng post for the other wire 23 of electric circuit.

The fixed terminal 15 hasaslit 24 through which the edge of the goods passes and the strip 18 has a slit 25 which is slightly wider,

than the thickness of the goods and the edge of the goods passes through this slit also and before it reaches the slit 24.. The strip 18 is on the side of the strip 15 from which the goods approaches the machine and when a v p thickened part, as the seam 26, engages the edges of the slit 25 it carries the'strip or-terminal 18 and swings it against the strip 15 as shown in dotted lines in Figure 2 and completes the electrical chine. If the stopping device does not act instantly the goods is not ripped and the device is circuit to stop the ma saved from excess strain by the slight resilien oy or give of the strip 15.

The terminals are insulated electrically from each otherand from the bracket 13 by suitable insulation as the strip 27 and the washers 28 or other construction readily understood by those skilled in the art.

7 Slight ,modifications can be made in the construction of the device without departing from the scope of the invention.

I I claim '1. A stop-operating device for a sewing machine comprising a fixed contact through which the edge of cloth can pass and a pivoted contact under thefixed contact and having a slot to receive the cloth, the slot being narrow to prevent the passage of a seam by which a seam will movethe pivoted contact up;

slits receiving the edge of goods being fed to the machine, the movable terminal being on 3. A stop-operating device comprising a 'gaged first and moved into contact with the fixed terminal by a seam in the goods engaging the slit edges of the slit.

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